Parse the "other" substitution: Trump is now talking about building something other than a wall, "similarly secure" doesn't mean secure, "similarly impassable" doesn't mean impassable, and contiguous doesn't say for how far. Then here's what he said on Twitter this past week on April 23, 2017:

Eventually, but at a later date so we can get started early, Mexico will be paying, in some form, for the badly needed border wall.

The water is getting pretty murky with "eventually" and "in some form" as Trump's response to Mexico's highly predictable refusal to pay for his big, beautiful border wall. And Trump's attempt this past week to get funding from Congress has also failed, so there will be no "early start". Ann Coulter is livid but then she's no Yoda: